Week 7: Structure and Composition of the Atmosphere Answers

Earth’s atmosphere provides that animals need to breathe.

Earth’s atmosphere filters out harmful radiation from the .

Read the question, and then use the drop-down menus to complete the paragraph.

argon ✔ oxygen nitrogen

✔ argon oxygen nitrogen

argon ✔ carbon dioxide nitrogen

✔ small particles ice crystals gas molecules

Use the drop-down menus to complete each sentence about the layers of the atmosphere.

mesosphere ✔ stratosphere ionosphere

thermosphere and troposphere stratosphere and mesosphere ✔ mesosphere and troposphere

thermosphere ✔ stratosphere troposphere

✔ thermosphere stratosphere troposphere

The atmosphere keeps Earth warm, allowing to exist as a liquid.

Which statements correctly describe the properties of air? Select three options.Air has mass but no weight.Air pressure is created by the weight of the atmosphere pushing on Earth’s surface.Pressure is a measure of how tightly molecules are packed.Denser air is heavier than less dense air.Air is less dense at higher altitudes.

Which image shows the place where the pressure and density of the atmosphere would be lowest?

On a warm summer day, a severe storm happens, and a tornado forms.Which layer of the atmosphere is experiencing this storm?

During an evening hike, you see a shooting star just like the one pictured here.In which layer of the atmosphere does this shooting star occur?

One evening, you see the northern lights, which are shown in the image.In which layer of the atmosphere do the northern lights occur?

Use the drop-down menus to complete each sentence about the layers of the atmosphere.